Help: 1974 Full time 4x4

[3del]

Help me understand about 4x4 full time in a 1974 Blazer.
Does it really hurt the mileage when it's full time.
Anything you all could tell me would help.Did all 73 thru 75 have full time?
I'm looking at a 74 Blazer now but I need some expert opinions.

Thanks

[Dooley]

Full time 4x4 does reduce mileage and increase tire wear. It's no big deal to install a part time kit and manual lockout hubs. The square body 4x4 light truck line with automatic transmission had the full time up through 1979.

[3del]

I just found out that the blazer I'm looking at does have lock out hubs so I guess thats a good thing.I have not seen the blazer that I was questioning yet. I'm trying to set up a time now.

[zimmstoy]

Dooley, who sells that kit for the part-time 4wd?

[ghettoluxury]

Dont remember who sells it but there is one for sale in the 73-87 parts board

[Dooley]

Originally Posted by zimmstoy

Dooley, who sells that kit for the part-time 4wd?

They can be bought from most any 4x4 parts place, Summit Racing, and some auto parts stores. I have always used the kits with complete shaft replacement for myself,(best for serious wheeling), but have installed some of the spider gear kits for others. Mile Marker is a common choice for these nowadays.
Here's a link to a review from another site.

http://www.coloradok5.com/milemarkerpt.shtml